RadComboBox on SplitContainer

[Roland]

Hello,

when I have a RadComboBox ( DataSource is  ObjectView )  on a RadSplitContainer it works, until I close the Solution. When I reopen the solution, run the program and I want to expand the ComboBox, I get an InvalidOperationException "Element already added". Only if I  completely delete the ComboBox and  create a new one, it works until I close and open the solution again.

WinControls-Version is 2010.1.10.308
OpenAccess-Version is 2010.1.310.2

Regards
Roland 

i found, that, if I make one or more copies  (<Ctrl>C, <Ctrl>V )  of the RadComboBox or if I move the ComboBox to a Windows, which is not a SplitContainer, it works.  The error occurs alwas in the first ComboBox in the SplitContainer.   If I delete the CombBox, where the error happens, the error happens on the next ComboBox.


here the exception-detail:

 

System.InvalidOperationException wurde nicht behandelt.

Message=

"Element already added"

 

 

Source=

"Telerik.WinControls"

 

 

StackTrace:

bei Telerik.WinControls.RadElementCollection.CheckElementAlreadyAdded(RadElement element)

bei Telerik.WinControls.RadElementCollection.OnInsert(Int32 index, Object value)

bei System.Collections.CollectionBase.System.Collections.IList.Add(Object value)

bei Telerik.WinControls.RadElementCollection.Add(RadElement value)

bei Telerik.WinControls.MeasurementControl.GetDesiredSize(RadElement element, SizeF availableSize)

bei Telerik.WinControls.UI.RadComboBoxElement.GetInitialPopupSize()

bei Telerik.WinControls.UI.PopupEditorBaseElement.ShowPopup()

bei Telerik.WinControls.UI.RadComboBoxElement.OnBubbleEvent(RadElement sender, RoutedEventArgs args)

bei Telerik.WinControls.RadElement.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)

bei Telerik.WinControls.RadItem.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)

bei Telerik.WinControls.RadElement.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)

bei Telerik.WinControls.RadElement.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)

bei Telerik.WinControls.RadItem.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)

bei Telerik.WinControls.RadElement.RaiseRoutedEvent(RadElement sender, RoutedEventArgs args)

bei Telerik.WinControls.RadElement.DoMouseDown(MouseEventArgs e)

bei Telerik.WinControls.RadElement.CallDoMouseDown(MouseEventArgs e)

bei Telerik.WinControls.ComponentInputBehavior.OnMouseDown(MouseEventArgs e)

bei Telerik.WinControls.RadControl.OnMouseDown(MouseEventArgs e)

bei System.Windows.Forms.Control.WmMouseDown(Message& m, MouseButtons button, Int32 clicks)

bei System.Windows.Forms.Control.WndProc(Message& m)

bei System.Windows.Forms.ScrollableControl.WndProc(Message& m)

bei Telerik.WinControls.RadControl.WndProc(Message& m)

bei System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)

bei System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)

bei System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

bei System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)

bei System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)

bei System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)

bei System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)

bei System.Windows.Forms.Application.Run(Form mainForm)

bei GUI1.Program.Main()

in C:\Projekte\Test\3TierArchitectur2\GUI1\Program.cs:Zeile 18.

 

bei System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)

bei System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)

bei System.Runtime.Hosting.ManifestRunner.Run(Boolean checkAptModel)

bei System.Runtime.Hosting.ManifestRunner.ExecuteAsAssembly()

bei System.Runtime.Hosting.ApplicationActivator.CreateInstance(ActivationContext activationContext, String[] activationCustomData)

bei System.Runtime.Hosting.ApplicationActivator.CreateInstance(ActivationContext activationContext)

bei System.Activator.CreateInstance(ActivationContext activationContext)

bei Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssemblyDebugInZone()

bei System.Threading.ThreadHelper.ThreadStart_Context(Object state)

bei System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

bei System.Threading.ThreadHelper.ThreadStart()

InnerException:

 

[Victor]

Hello Roland,

Thank you for the feedback. I could not reproduce the issue, but I have a rather good idea where the code misbehaves. 

Please send a small sample application which demonstrates the issue if possible. 

The fix I have added will be available in Q1 2010 Service Pack 1 scheduled for the first half of the next month. In the mean time you can set the Virtualized property of RadComboBox to false and see if this helps.

I am looking forward to your reply. Your Telerik points have been updated for the bug report.

Greetings,
Victor
the Telerik team

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